JPH10147821A - Method for refining copper - Google Patents

Method for refining copper

Info

Publication number
JPH10147821A
JPH10147821A JP30816696A JP30816696A JPH10147821A JP H10147821 A JPH10147821 A JP H10147821A JP 30816696 A JP30816696 A JP 30816696A JP 30816696 A JP30816696 A JP 30816696A JP H10147821 A JPH10147821 A JP H10147821A
Authority
JP
Japan
Prior art keywords
copper
slag
feo
refining
flux
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP30816696A
Other languages
Japanese (ja)
Inventor
Hiromi Mochida
裕美 持田
Tsuyoshi Toma
堅 東馬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Materials Corp
Original Assignee
Mitsubishi Materials Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Materials Corp filed Critical Mitsubishi Materials Corp
Priority to JP30816696A priority Critical patent/JPH10147821A/en
Publication of JPH10147821A publication Critical patent/JPH10147821A/en
Withdrawn legal-status Critical Current

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Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Manufacture And Refinement Of Metals (AREA)

Abstract

PROBLEM TO BE SOLVED: To efficiently refine copper having a high purity by adding concrete waste material as flux into molten copper and as necessity requires, the other component to form FeO-CaO-SiO2 three-component system slag. SOLUTION: At the time of melting and refining a high quality copper scrap, a concrete waste material crushed into the suitable size as flux and as necessity requires, SiO2 component and FeO component, are added. By this method, on the surface of molten copper, the FeO-CaO-SiO2 three-component system slag, desirably the slag having the composition of 31-60wt.% FeO, 28-35% CaO and 31-40% SiO2 is formed. In the case of using the slag having such a composition, the slag having comparatively low m.p. about 1100-1200 deg.C, and excellent in impurity removal performance, is obtd. and the refining can efficiently be executed under good treatment. It is desirable that the flux quantity if added so as to form the slag quantity having about 20-30wt.% to the molten copper.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は銅の精錬方法に係
り、特に、廃家電、シュレッダーダスト、廃耐久消費材
等の銅含有廃材を固相精製法、高度溶解法等により処理
して得られる高品位銅スクラップをコンクリート廃材を
用いて安価に溶融精錬する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for refining copper, and more particularly to a method for refining copper-containing waste materials such as waste home appliances, shredder dust, and waste durable materials by a solid phase refining method, an advanced melting method and the like. The present invention relates to a method for inexpensively melting and refining high-grade copper scrap using waste concrete.

【０００２】[0002]

【従来の技術】廃家電、シュレッダーダスト、廃耐久消
費材等の銅含有廃材から銅を回収して再利用するには、
まず、これらの廃材を固相精製法、高度溶解法等により
処理して、Ｃｕ含有量７０％以上の高品位銅スクラップ
を得、この高品位銅スクラップを更に溶融精錬し、Ｚ
ｎ，Ｆｅ，Ｎｉ，Ｐｂ，Ｓｎ等の不純物元素を除去して
純度を高める。2. Description of the Related Art To recover and reuse copper from copper-containing waste materials such as waste home appliances, shredder dust, and waste durable materials,
First, these waste materials are treated by a solid phase refining method, an advanced melting method or the like to obtain a high-grade copper scrap having a Cu content of 70% or more, and the high-grade copper scrap is further melt-refined.
The impurity elements such as n, Fe, Ni, Pb, and Sn are removed to increase the purity.

【０００３】この銅スクラップの溶融精錬に当っては、
従来、ＣａＯ−Ｆｅ2 Ｏ3 系スラグが用いられている。[0003] In the melting and refining of this copper scrap,
Conventionally, CaO—Fe 2 O 3 slag has been used.

【０００４】[0004]

【発明が解決しようとする課題】銅スクラップの溶融精
錬に当って、フラックスとして各種の分野から排出され
る廃材を有効利用できるならば、精錬コストを大幅に低
減することができる。In the refining of copper scrap, if waste materials discharged from various fields can be effectively used as flux, the refining cost can be greatly reduced.

【０００５】本発明は、フラックスとして廃材を利用し
て銅を安価に溶融精錬して、純度の高い銅を得る方法を
提供することを目的とする。[0005] It is an object of the present invention to provide a method for obtaining high-purity copper by inexpensively melting and refining copper using waste material as a flux.

【０００６】[0006]

【課題を解決するための手段】本発明の銅の精錬方法
は、銅溶湯にフラックスを添加して銅を精錬する方法に
おいて、該フラックスとしてコンクリート廃材を用いる
ことを特徴とする。The copper refining method of the present invention is a method of refining copper by adding a flux to a molten copper, characterized in that waste concrete is used as the flux.

【０００７】即ち、本発明者らは、銅の溶融精錬に当
り、不純物を除去するためのスラグ組成について種々検
討を重ねた結果、ＦｅＯ（又はＦｅ2 Ｏ3 ）−ＣａＯ−
ＳｉＯ2 系スラグが銅の溶融精錬に極めて有効であるこ
とを見出した。そして、このＦｅＯ−ＣａＯ−ＳｉＯ2
系スラグを形成するためのフラックスとしてコンクリー
ト廃材が有効であることを見出し本発明を完成させた。That is, the present inventors have conducted various studies on the slag composition for removing impurities in the melting and refining of copper, and as a result, found that FeO (or Fe 2 O 3 ) —CaO—
It has been found that SiO 2 -based slag is extremely effective in refining copper. And this FeO-CaO-SiO 2
The present inventors have found that concrete waste is effective as a flux for forming a system slag, and have completed the present invention.

【０００８】本発明においては、銅溶湯にフラックスと
してコンクリート廃材を添加すると共に、必要に応じて
他のフラックス成分を添加することにより、ＦｅＯ−Ｃ
ａＯ−ＳｉＯ2 三成分組成系において、ＦｅＯ：３１〜
６０重量％、ＣａＯ：２８〜３５重量％、ＳｉＯ2 ：３
１〜４０重量％の組成を有するＦｅＯ−ＣａＯ−ＳｉＯ
2 系スラグを形成するのが好ましい。In the present invention, the concrete waste material is added to the molten copper as a flux and, if necessary, other flux components are added, so that the FeO-C
In aO--SiO 2 ternary composition system, FeO:. 31 to
60 wt%, CaO: 28 to 35 wt%, SiO 2: 3
FeO-CaO-SiO having a composition of 1 to 40% by weight
It is preferable to form a binary slag.

【０００９】[0009]

【発明の実施の形態】本発明においては、銅の溶融精
錬、好ましくは、廃家電、シュレッダーダスト、廃耐久
消費材等の銅含有廃材を固相精製法、高度溶解法等によ
り処理して得られる高品位銅スクラップの溶融精錬に当
り、フラックスとして適度な大きさに粉砕したコンクリ
ート廃材と必要に応じてＳｉＯ2 成分及び／又はＦｅＯ
成分を添加して、銅溶融表面に、ＦｅＯ−ＣａＯ−Ｓｉ
Ｏ2 三成分組成系において、好ましくはＦｅＯ：３１〜
６０重量％、ＣａＯ：２８〜３５重量％、ＳｉＯ2 ：３
１〜４０重量％の組成を有するスラグを形成する。この
ような組成のスラグであれば、融点１１００〜１２００
℃の比較的低融点の、不純物除去性能に優れたスラグと
なり、良好な取り扱い性のもとに、効率的な精錬を行え
る。BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, copper refining, preferably copper-containing waste materials such as waste home appliances, shredder dust, waste durable consumables, etc., is processed by a solid phase refining method, an advanced melting method or the like. In the refining of high-grade copper scrap produced, concrete waste material pulverized to an appropriate size as flux and SiO 2 component and / or FeO if necessary
Add FeO-CaO-Si to the copper melt surface
In the O 2 ternary composition system, preferably FeO: 31 to
60 wt%, CaO: 28 to 35 wt%, SiO 2: 3
A slag having a composition of 1 to 40% by weight is formed. If the slag has such a composition, the melting point is 1100 to 1200.
A slag having a relatively low melting point of ° C. and excellent in impurity removal performance, and efficient refining can be performed with good handleability.

【００１０】スラグ組成が上記範囲外であると、精錬効
果が低く、また、スラグの粘性が高くなったり、スラグ
の分離性が悪くなったり、スラグが１３００℃を超える
高融点となったりして、良好な精錬作業を行えなくな
る。If the slag composition is out of the above range, the refining effect is low, the slag viscosity is high, the slag separability is poor, and the slag has a high melting point exceeding 1300 ° C. , A good refining operation cannot be performed.

【００１１】下記表１に示すように、コンクリート廃材
の主成分はＳｉＯ2 ，ＣａＯ，Ｆｅ2 Ｏ3 ，Ａｌ2 Ｏ3
等であり、その他微量成分としてＭｇＯ，ＺｎＯ等が含
有されている。従って、このコンクリート廃材にＳｉＯ
2 成分及び／又はＦｅＯ成分を添加して、銅溶湯上に上
記三成分組成のスラグを形成するのが精錬効果の面で好
ましい。As shown in Table 1 below, the main components of the concrete waste material are SiO 2 , CaO, Fe 2 O 3 , and Al 2 O 3.
And MgO, ZnO and the like as other trace components. Therefore, this concrete waste material has SiO
It is preferable from the viewpoint of the refining effect that a slag having the above three-component composition is formed on the molten copper by adding the two components and / or the FeO component.

【００１２】なお、本発明において、上記ＦｅＯ−Ｃａ
Ｏ−ＳｉＯ2 三成分組成の割合は、Ａｌ2 Ｏ3 ，Ｚｎ
Ｏ，ＭｇＯ，その他の不純物を除き、ＦｅＯ（ただし、
Ｆｅ2Ｏ3 はＦｅＯに換算），ＣａＯ及びＳｉＯ2 の三
成分で合計１００％として換算した値である。In the present invention, the above FeO-Ca
The ratio of the ternary composition of O—SiO 2 is Al 2 O 3 , Zn
Except for O, MgO and other impurities, FeO (however,
(Fe 2 O 3 is converted to FeO), CaO and SiO 2 are converted into a total of 100%.

【００１３】[0013]

【表１】 [Table 1]

【００１４】なお、ここで、スラグ組成の調整のために
コンクリート廃材と共に添加するＳｉＯ2 成分、ＦｅＯ
成分としては、ケイ石、鉄スクラップ等を用いることが
できる。ＦｅＯ成分としてはＦｅを添加し、これが精錬
中に酸化されてＦｅ2 Ｏ3 となるのを利用しても良い。Here, for the purpose of adjusting the slag composition, the SiO 2 component and FeO added together with the concrete waste material are used.
As a component, silica stone, iron scrap, or the like can be used. As the FeO component, Fe may be added, and the fact that this is oxidized during refining to form Fe 2 O 3 may be used.

【００１５】本発明に従って、廃家電、シュレッダーダ
スト、廃耐久消費材等の銅含有廃材を固相精製法、高度
溶解法等により処理して得られる高品位銅スクラップ等
の銅を精錬するには、これらの銅のスクラップを溶融す
ると共に、コンクリート廃材及び他のフラックス成分を
添加し、１２００〜１３００℃で空気、酸素富化空気等
を吹き込む。この場合の空気量は銅スクラップの品位に
より異なる。According to the present invention, to refine copper such as high-grade copper scrap obtained by treating copper-containing waste materials such as waste home appliances, shredder dust, and waste durable materials by a solid phase refining method, an advanced melting method, or the like. Melting these copper scraps, adding concrete waste and other flux components, and blowing air, oxygen-enriched air, etc. at 1200 to 1300 ° C. The amount of air in this case differs depending on the grade of copper scrap.

【００１６】なお、フラックス添加量は銅溶湯に対して
２０〜３０重量％程度のスラグが形成されるような量と
するのが好ましい。The amount of the added flux is preferably such that slag of about 20 to 30% by weight is formed with respect to the molten copper.

【００１７】また、通常の銅精錬等でも行われている
が、溶製に当って、空気吹込み溶製を行った後、銅溶湯
上のスラグの一部又は全部を掻き取り（スキミング）、
更に空気吹込み溶製を行うことにより、より一層純度の
高い銅を作ることができる。[0017] In addition, although ordinary copper refining or the like is also performed, in melting, after performing air blowing melting, a part or all of the slag on the molten copper is scraped (skimming).
Further, by performing air blowing melting, copper with higher purity can be produced.

【００１８】[0018]

【実施例】以下に実施例及び比較例を挙げて本発明をよ
り具体的に説明する。The present invention will be described more specifically below with reference to examples and comparative examples.

【００１９】実施例１〜４，比較例１〜４ 表２に示すスラグ組成となるように、銅溶湯に粉砕した
コンクリート廃材と試薬のＦｅ2 Ｏ3 とＳｉＯ2 とを添
加し、それぞれ各温度で銅の溶融精錬を行った。Examples 1 to 4 and Comparative Examples 1 to 4 Concrete waste materials crushed into a molten copper and reagents Fe 2 O 3 and SiO 2 were added so that the slag compositions shown in Table 2 were obtained. Smelted and refined copper.

【００２０】溶製は、銅をアルゴン雰囲気中１２００℃
まで昇温した後、フラックスを添加し、各々の温度で吹
き込み空気量１Ｌ／ｍｉｎの条件で行った。そして、所
定時間経過毎にサンプリングを行って、不純物分析を行
い、結果を表３〜８に示した。For melting, copper is heated to 1200 ° C. in an argon atmosphere.
After the temperature was raised to, the flux was added, and the air was blown at each temperature under the conditions of a flow rate of 1 L / min. Then, sampling was performed every predetermined time, and impurity analysis was performed. The results are shown in Tables 3 to 8.

【００２１】なお、各スラグの融点は表１に示す通りで
あり、比較例１，２のものは粘性が高く、いずれも１３
５０℃で溶製を行ったがスラグの粘性が高いためにサン
プリング不可能であった。また、比較例３，４のものは
分離性が悪く、良好な精錬を行えなかった。The melting points of the slags are as shown in Table 1, and those of Comparative Examples 1 and 2 have high viscosity.
Melting was performed at 50 ° C., but sampling was not possible due to the high viscosity of the slag. Further, those of Comparative Examples 3 and 4 were poor in separability and could not be satisfactorily refined.

【００２２】[0022]

【表２】 [Table 2]

【００２３】[0023]

【表３】 [Table 3]

【００２４】[0024]

【表４】 [Table 4]

【００２５】[0025]

【表５】 [Table 5]

【００２６】[0026]

【表６】 [Table 6]

【００２７】[0027]

【表７】 [Table 7]

【００２８】[0028]

【表８】 [Table 8]

【００２９】[0029]

【発明の効果】以上詳述した通り、本発明の方法によれ
ば、各種産業分野から廃棄物として排出されるコンクリ
ート廃材を有効利用して、銅を低コストで効率的に精錬
して高純度の銅を得ることができる。As described in detail above, according to the method of the present invention, copper waste can be efficiently refined at low cost by effectively utilizing concrete waste materials discharged as wastes from various industrial fields to achieve high purity. Of copper can be obtained.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 銅溶湯にフラックスを添加して銅を精錬
する方法において、該フラックスとしてコンクリート廃
材を用いることを特徴とする銅の精錬方法。1. A method for refining copper by adding a flux to a molten copper, comprising using concrete waste material as the flux. 【請求項２】 請求項１の方法において、銅溶湯表面に
形成されたスラグが、ＦｅＯ−ＣａＯ−ＳｉＯ2 三成分
組成系において、ＦｅＯ：３１〜６０重量％、ＣａＯ：
２８〜３５重量％、ＳｉＯ2 ：３１〜４０重量％の組成
を有することを特徴とする銅の精錬方法。2. The method according to claim 1, wherein the slag formed on the surface of the molten copper is FeO: CaO—SiO 2 ternary composition system, FeO: 31 to 60% by weight, CaO:
28 to 35 wt%, SiO 2: 31 to 40 refining process of copper and having a weight percent composition.
JP30816696A 1996-11-19 1996-11-19 Method for refining copper Withdrawn JPH10147821A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30816696A JPH10147821A (en) 1996-11-19 1996-11-19 Method for refining copper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30816696A JPH10147821A (en) 1996-11-19 1996-11-19 Method for refining copper

Publications (1)

Publication Number Publication Date
JPH10147821A true JPH10147821A (en) 1998-06-02

Family

ID=17977700

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JPH10147821A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000009772A1 (en) * 1998-08-14 2000-02-24 Sumitomo Metal Mining Co., Ltd. Method for smelting copper sulfide concentrate
JP2003001267A (en) * 2001-06-26 2003-01-07 Onahama Smelting & Refining Co Ltd Method for removing mercury containing in waste gas
US6843827B2 (en) 2000-08-22 2005-01-18 Sumitomo Metal Mining Co., Ltd. Method of smelting copper sulfide concentrate
JP2012201894A (en) * 2011-03-23 2012-10-22 Jx Nippon Mining & Metals Corp Treatment method of copper containing iron and tin
JP2012201896A (en) * 2011-03-23 2012-10-22 Jx Nippon Mining & Metals Corp Apparatus and method for treating copper containing iron and tin
JP2012229472A (en) * 2011-04-26 2012-11-22 Jx Nippon Mining & Metals Corp Treatment method of tin inclusion copper
CN103572069A (en) * 2013-11-18 2014-02-12 梧州漓佳铜棒有限公司 Batching and smelting method for smelting blister copper by scrap copper

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000009772A1 (en) * 1998-08-14 2000-02-24 Sumitomo Metal Mining Co., Ltd. Method for smelting copper sulfide concentrate
GB2350122A (en) * 1998-08-14 2000-11-22 Sumitomo Metal Mining Co Method for smelting copper sulfide concentrate
US6416565B1 (en) 1998-08-14 2002-07-09 Sumitomo Metal Mining Co., Ltd. Method for smelting copper sulfide concentrate
GB2350122B (en) * 1998-08-14 2003-01-29 Sumitomo Metal Mining Co Method of smelting copper sulfide concentrate
US6843827B2 (en) 2000-08-22 2005-01-18 Sumitomo Metal Mining Co., Ltd. Method of smelting copper sulfide concentrate
JP2003001267A (en) * 2001-06-26 2003-01-07 Onahama Smelting & Refining Co Ltd Method for removing mercury containing in waste gas
JP2012201894A (en) * 2011-03-23 2012-10-22 Jx Nippon Mining & Metals Corp Treatment method of copper containing iron and tin
JP2012201896A (en) * 2011-03-23 2012-10-22 Jx Nippon Mining & Metals Corp Apparatus and method for treating copper containing iron and tin
JP2012229472A (en) * 2011-04-26 2012-11-22 Jx Nippon Mining & Metals Corp Treatment method of tin inclusion copper
CN103572069A (en) * 2013-11-18 2014-02-12 梧州漓佳铜棒有限公司 Batching and smelting method for smelting blister copper by scrap copper

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